trunc_page64
trunc_page64((intptr_t)arginfo - szsigcode);
sigbase = trunc_page64((intptr_t)PS_STRINGS -
regs->tf_rip = trunc_page64(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
regs->tf_rip = trunc_page64(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
phys_avail[i].phys_end = trunc_page64(phys_avail[i].phys_end);